Ontology highlight
ABSTRACT:
SUBMITTER: Malko AV
PROVIDER: S-EPMC3392898 | biostudies-literature | 2011 Dec
REPOSITORIES: biostudies-literature
Malko Anton V AV Park Young-Shin YS Sampat Siddharth S Galland Christophe C Vela Javier J Chen Yongfen Y Hollingsworth Jennifer A JA Klimov Victor I VI Htoon Han H
Nano letters 20111118 12
We report a systematic study of photoluminescence (PL) intensity and lifetime fluctuations in individual CdSe/CdS core/shell nanocrystal quantum dots (NQDs) as a function of shell thickness. We show that while at low pump intensities PL blinking in thin-shell (4-7 monolayers, MLs) NQDs can be described by random switching between two states of high (ON) and low (OFF) emissivities, it changes to the regime with a continuous distribution of ON intensity levels at high pump powers. A similar behavi ...[more]